What if Groot had become Stormbreaker in Avengers: Infinity War?

If I had to bet, I'd say the Russos planned on doing it this way but then took it out because it didn't fit with Endgame or something. 

There's so much buildup to the creation of Stormbreaker, as if someone like Thor is going to die, or maybe Groot is going to sacrifice himself for him. 

But then nothing really happens. 

It's feels like a fakeout. Groot doesn't even go armless for more than a second. He's just back to normal.

But again it's a two-parter, so maybe that part of the movie will be better in hindsight. Idk. 

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