So with the most recent episode of mandolorian, it appears that grogu will likely be trained.
I can think of one candidate that would be most likely to look the other way on the attachment issue that ashoka had with training him. That would be Luke.
But that potentially creates problems with the sequels. Like where is grogu in them?
I see two possibilities if Luke trains Grogu.
1. It fits in with the sequels and spells a dark end for grogu. I don't see thos as likely though.
2. The sequel trilogy is in the timeline where ashoka is killed by vader. The mandolorian is obviously in the one where she survives. This makes sense to me at least. If ashoka would have died, then mando hits a dead end on finding jedi. Gideon catches up with them, and then the bad guys win and you get snoke.
But with ashoka surviving, it's now changed where any number of things can happen.
I personally see this as a good thing since the sequels created a lot of problems to try and fit in and it's better to have a timeline that fits better going forward.