Seems like there’s potential space in a lot of the undercarriage, or as flat packs at the base of the engine and trunk compartments.

There are some companies working on electric crate engines for conversion, I forget the names but they should be ready sometime soon

Ford has at least one now, I think VW does as well

It takes time. You generally can’t work on multiple major projects at once so when you have to schedule your time to advance in your career, you don’t go for any offer just the one that offers the best benefit. Marvel didn’t seem like a good enough benefit at the time.