I don't think Howard should get his own rebooted movie in the MCU, but I do think he could get a really interesting team up movie alongside known allies like Man-Thing and She-Hulk.
I will admit though, since I just found out that Guardians of the Galaxy Howard was played by Seth Green, I'm pretty psyched to know Green is now part of the MCU and I would really like to see him again. Maybe give him a bigger part in Guardians 2, maybe that thing I already said, but I just dunno if they should do a solo film for the foul mouthed fowl (not saying they couldn't, given what Marvel Studios has pulled off I wouldn't be surprised if it was amazing, I just think he'd work better with a team)