Too early to say whether Kohli is back in form or not.
This is very worrying sign for India and i hate to say that Kohli is turning out to be disaster.
He did score 80ish runs in last 2 matches but it wasn't typical Kohli's knock. He's considered master in rotating strikes in any situation but that's hardly a case nowadays, just look at his recent Strike rate.
I don't think India is going to worry that much because they do have players to substitute him. and as he is not in the form I really don't think there is any reason why he should be playing in the national team playing 11. he should play every match in the IPL so that he can show some light of hope but if he can not I think he should be dropped from the team.
I am still hopeful about Virat Kohli and I think he is just putting too much pressure on himself and that's why his performance is not good at all right now. let's see what he can do in the IPL till the end of the tournament