I've been wanting to do a DC and Marvel crossover for awhile now and this is what I came up with. If you've read the summary then I will say I got inspired to write this while I watched Endgame again and also the fanfic 'Little Bird's Vengeance' by KatHarkness-Katara was a big inspiration as well :)

Tim's P.O.V
That is the last time I ever go on a mission with both Dick and Jason when I'm in a terribly bad mood. 'It'll be a simple mission. A chance to hang out with one another. Nothing to worry about. Just an in and out operation with no secret missing information what so ever' well as you can tell by the sarcasm in my voice, they were dead wrong... everything was in fact a-

Flashback
"-Set up! How should I have known this whole thing was in fact a set up?!" Jason yelled from across the room as I turned to see him in the middle of beating one of the many lower class thugs

"Next time we double check the information given to you" Nightwing shouted from above as a scream was heard, guess the thug just got a dose of a high voltage of electricity from Dick's escrima sticks

"Hey my guy has always given me the correct information! I'm not about to go on and blame him for one mistake, I'm not cruel. Besides maybe it was your guy who gave you the misleading information!" Jason shouted right back

"How about both of you shut up and fight so we can end this! Who cares who was right or wrong, in the end both of you fell for it and brought me along for the ride even after I said I didn't want to come along!" I yelled at them. I was in no mood to chat or listen to my two adopted brothers argue about what who was to blame

"Wasn't that a little harsh?" asked one of the thugs that I had just beat up, laying on the floor. I glared at him very hard and he made the wise choice of shutting up and backing himself towards a pillar that was conveniently behind him

"Geez Red, calm down a little" Dick said with a concerned expression after we finished up with all these lower class rate villains... how on earth had they even managed to set up both Dick and Jason in the first place?!

"Yeah what Wingnut here said. Besides don't tell me that punching a few thugs wasn't satisfying for you?" Jason asked with a slight amused tone, yet their was a hint of concern as well

"Not as satisfying as when I punch both you and Nightwing for dragging me into this whole mess" I angrily snapped as I went over to inspect the machine that these thugs were supposedly protecting for who knows who. First thing I noticed was the many guns and panels it seemed to have as I inspected the device

"What'd you do to baby bird for him to get all snappy with us?" I heard Jason ask Dick as I knew this was going to lead into a whole new argument between the two again. When they want to, they work like a great pair... however I just had to get stuck with the day they wanted to play the blame game

"Me? Why does it have to be my fault! It could just as well be your fault!" Dick shout right back at the second Robin

I don't know who I prefer dealing with right now; Damian or Dick and Jason when they are in the same room together... probably these two since they don't try to kill me every chance they get (Although Jason did try to in the beginning)

It seems like this machine is more heavily guarded than I thought it was. 'Good thing this sort of thing is my specialty' with that thought, I opened up the panel which held the multiple wires and got straight to work, allowing the older two heroes to argue all they want

"At least I didn't try to kill him multiple times!" Dick shouted as I decided to listen in back to what it was they kept yelling about and no surprise it was about me still

"Big talk coming from the guy who forced him out of the Robin mantle!" Jason replied back

Yeah I can agree with Jason on that, even if he did try to kill me many times in the past, nothing can beat the fact that Dick literally made me give up being Robin without even consulting me... wait how did the conversation get to that topic anyway!

"My my, it seems these thugs I hired did there job well. Three little birds out of four have flown out from the nest that is the big bad Bat" a new voice said as all three of us looked to where the voice came from, but saw nothing

"I swear if I have to fight a ghost that can literally phase through everything I throw, then I'll be the next person who gets mad" Jason commented with a tone that suggested he was being serious... has he fought ghosts before?

"I am no ghost, rest assured. I am merely not allowing any of you to know my whereabouts. Now be nice bird boys and step away from my machine" the voice said yet again, but getting more demanding at the end

"Ya, I think we'll take a pass on that in saying this machine won't even get within reach of you" Dick said twirling his escrima sticks, while I take out my bo staff out and extend it to it's full length once again

The response we were expecting was that of a counter argument, not laughter "Aren't we confident in ourselves. I truly hate to disappoint you, but you're wrong" the voice said coming from beside me as I finally saw who it was that wanted this weird looking machine

The person had a black mask on them covering up their whole face, with a large metal sort of shield that seemed to cover their face from the lip downwards. They wore mainly dark clothing and had a long cape and hood. Great a new player who wants to become the next headline it seems

From the corner of my eye I see Dick and Jason get into fighting positions and weapons on hand "Tsk tsk, that won't do. I can't have you going around hitting or shooting me, now can I" he said in a tone that meant he was serious as suddenly our weapons were ripped from our grasp and went flying across the room

"What are you a psychic or something?" Jason questioned as he took out his backup gun... only to have the same thing happen again

"You could say that. Now be good little bats and let me get onto my work" he stated and turned back towards the machine

"He seems very confident to think that he's won" Dick said as I rolled my eyes at this 'Way to state the oblivious'

"Then we just need to charge in and attack!" Jason said and went to go attack, while I sighed knowing that this would not end well

"Hood no!" Dick shouted trying to pull hood back until I saw both older boys suddenly become suspended in the air with a dark purple outline surrounding them both

Seeing as metal mask was busy keeping my brothers in place and immobilized by his psychic powers, I was the only one left to stop the machine

"Red look out!"

I suddenly feel a blast hit me from behind as I slammed into the machine, not noticing the fact that I had moved the switch to 'on'

"I won't let my plans be ruined by a bunch of children in a mask and cape" Metal mask said as I ignored the angry response from both older heroes after being called children

I moved out of the way and saw as a few bolts of electricity sparked from the machine "Not good" metal mask said in a voice suggesting he had not expected this to happen

"Well seems I no longer have use for that machine anymore. That means it's my cue to leave. Sayonara!" he said in a fake cheery voice and disappeared from view

"So he can shoot bolts of energy, has psychic powers and can disappear?! Who is this guy?" Jason said in defeat as he went over to the pile of weapons and grabbed ahold of his guns and passed Dick his escrima sticks

"Ask questions later! We need to figure out how to stop this thing!" I yelled and moved closer towards the machine as I tried to make it stop from overloading, not noticing one of the many guns pointed at me glowing a bright white

"Tim!" was the last thing I heard as I suddenly disappeared from the warehouse and my last conscious though was 'Never go on a mission with Dick and Jason for a year, it only leads to trouble'
End of Flashback

And now I'm who knows where with no way of contacting home, since both my com-link and phone aren't responding for some unknown reason. Well there is one bright side... no more having to listen to both Dick or Jason at least

'This will be fun' I thought with a sigh and with that decided to make my way towards civilization hopefully

Alright so the prologue kicks of with explaining how Tim finds himself stranded in the MCU, sorry if the chapter sounded lame or boring... I'll try and make Tim have important parts since the next chapter will slowly tie into the movie. If you have any ideas or some advice, feel free to message me :)
Since this story is mostly based on the New 52/Rebirth comics I went with costumes of them, as such costumes for them here are; Dick (New 52, but blue instead of red), Jason (Current, it's a good look) and Tim (New 52, I actually like that suit)