Even if wenger decides to spend next term he wouldn't be spending on costa but rather a new Unknown player with potential-that has been his stock in trade so let's wait and see but I thought he was actually going to get fired at the end of the season but maybe the consolation trophy saved his ass.
I think Wenger buying Costa will be a great idea but with his character, I don't think he will be able to handle him, Costa will cause a mutiny in the dressing room that's for sure.
Even though Costa is a problematic man, he is closing the line with his football. I can say that I would be good for Arsenal, but Wenger is the one who should go.