With the way the MCU is going, I think it would be a natural fit to go straight into Richard's origin with Thanos destroying Xandar, and Dey giving Rider his powers. Then Rich can learn on the job as he gets sucked into some cosmic Marvel conflict.
I'm thinking someone like Scott Eastwood would be perfect for Richard's role.
My take on Richard's name being an issue is that the movie will only refer to him as Rich and Richard (just as in the comics), and it'll only be a topic for those who WANT to make it one.