So just to clarify.
If Arsenal lose against Forest then we will definitely lift the trophy on Sunday no matter what.
If Arsenal draw against Forest then we only need a draw against Chelsea to lift the trophy on Sunday.
If Arsenal win against Forest then we will need to beat Chelsea to lift the trophy on Sunday.
Personally, I would like a draw in the Arsenal vs Forest game.
Although it wouldn't technically make us champions, we would be in all but name because of our far superior goal difference. In order for us to lose it from there we would have to lose our last three games, Arsenal would have to beat Wolves and there would have to be a 20 goal swing which isn't going to happen.
It would also mean we get the chance to win it whilst playing in front of our own fans. There would be less pressure on us in the Chelsea game because we would know that we're going to win the league at some point anyway and that a draw is all we need to officially make us champions and lift the trophy on the day.
Obviously I wouldn't say no to a Forest win though.