Thanos was included in the film at Marvel Studios ... Drax, Rocket Raccoon, and Groot — and building all of them out into fully-developed roles that would be compelling to audiences.

Groot joined the rebooted Guardians of the Galaxy ... The first changed her name to Martyr, but Thanos killed her. The second ...

Groot, no. Narrator: It looks like Rocket is ... Is this them saying goodbye again as he goes to take on Thanos? Hawkeye has a lot more tattoos than the last time we saw him.