If you want to talk to me on the Xbox about this my gamertag is WinnableHarp7.
ODST have a series? I don’t really think it needs one, the only way I can see ODST have some sort of sequel is if a ODST showed more of a backstory on a particular subject taking place probably before even Halo 3. Although, really the books explain more on the characters and loose ends we may have questions about in the halo universe. So unless they make a filler game and not a canon game, than I can see that.
What would be cool is if we see a game based on Agent Locke (before Halo 5) maybe in his ODST days…(if he was a ODST)
Quick Summary: ODST series needed? Not really
Would it be cool? Of course, although, it has to be executed right.
I think that would be cool