There are a handful of LEGO games which have been made BC (Batman, Pirates of the Caribbean, and SW: The Complete Saga), so it's a possibility, but it's been a while (Feb. 2016) since the last one was added.
The Xbox website has a place to vote/leave feedback on what games go BC, but what effect that really has is anyone's guess, as it's generally up to the game's publisher if/when a game goes BC. But leaving feedback can't hurt, you know?LEGO Indiana Jones: The Original AdventuresLEGO Indiana Jones 2: The Adventure Continues
I would guess we'll see one or both of those games eventually, but it may be a while. Perhaps as we get closer to Indy 5 in 2019.