What if it was the opposite? Rewrite 2

It worked!

Later at the Avenger's Compound, Thor was in a hoodie, drinking a beer and walking through the compound's Testing Chamber and Peter was walking in from behind him.

"Drifting left. On the side there, Lebowski." Peter said to him. "Ratchet, How's it going?" he asked Rocket working on something underneath a glass platform.

"It's Rocket. Take it easy. You're only a genius on Earth, pal." Rocket said.

Later they in a side room, Scott, Bruce, Steve and Rhodey were talking and Scott was in a white and red suit, similar to the Ant-Man suit.

"Time travel suit? Not bad." Rhodey said.

"Hey, hey, hey! Easy, easy!" Scott said and response to Hulk touching the suit and something red in a glass tube.

"I'm being very careful." Bruce said.

"No, you're being very Hulky."

"I'm being careful."

"These are Pym Particles, alright? And ever since Hank Pym got snapped out of existence, this is it. This is what we have. We're not making any more." Scott said holding up the red glass bottle.

"Scott, calm down." Rhodey said.

"Sorry. We've got enough for one round trip each. That's it. No do-overs. Plus two test runs." Scott said and accidentally pressed a button, and shrunk then grew back to his normal size. "One test run."

Later at the testing chamber, Steve, Natasha, Peter, Scott, Bruce, Rhodey and Nebula were standing at a control panel, presumably controlling the glass platform.

"All right. I'm not ready for this." Scott said.

"I'm game. I'll do it." Clint said and walked in wearing the suit Scott was moments before, the Quantum Suit.

"Clint, now you're gonna feel a little discombobulated from the chronoshift. Don't worry about it." Bruce said while Clint was taking position on the platform.

"Wai-Wait a second, let me ask you something. If we can do this, you know, go back in time, why don't we just find baby Thanos, you know, and..." Rhodey said and made a hand gesture suggesting that they strangle baby Thanos with a rope.

"First of all, that's horrible..." Bruce said disgusted.

"It's Thanos." Rhodey said in a tone saying it's what we're thinking.

"...And secondly, time doesn't work that way. Changing the past doesn't change the future."

"Look, we go back, we get the stones before Thanos gets them... Thanos doesn't have the stones. Problem solved." Scott said.

"Bingo." Clint said.

"That's not how it works." Nebula said.

"Well, that's what I heard."

"What? By who? Who told you that?" Bruce asked.

"Star Trek, Terminator, TimeCop, Time After Time -" Rhodey said counting with his fingers.

"Quantum Leap -" Scott said.

"A Wrinkle in Time, Somewhere in Time -"

"Hot Tub Time Machine -"

"Hot Tub Time Machine. Bill and Ted's Excellent Adventure. Basically, any movie that deals with time travel."

"Die Hard? No, it's not one..."

"This is known."

"I don't know why everyone believes that, but that isn't true. Think about it: If you travel to the past, that past becomes your future. And your former present becomes the past. Which can't now be changed by your new future..." Bruce said.

"Exactly." Nebula said.

"So... Back To The Future's a bunch of bullshit?" Scott said.

"Alright, Clint. We're going in 3... 2... 1!" Bruce said turning to Clint.

A helmet similar to Ant-Man's but white and more visible face popped on Clint's head, and he went quantum and flew through the quantum realm into an opening. Then he grew back to normal size, but at a different place, and seemingly, time.

He looked around his family home, unlike at the start of the movie, looked a lot more alive. The helmet popped off of his head, and he looked around bewildered and saw a baseball glove on the ground, presumably belonging to one of his sons, and picked it up.