Poll
31%
28%
16%
25%
Current Thanos is more back at his classic power levels (which is actually a good thing character-wise). He was beaten down fairly convincingly by Groot, Hulk, Rulk, and Thor with some minor assists.
Supes, WW, MM, and GL should be able to replicate that. They have the strength, incredible speed (far more so than that Avengers team) and the tools. They have a lasso capable of wrapping up and restraining Thanos at the end of the fight so he doesn't get back up again.
Thanos will put up a fight but he's not winning this.
Thanos might lose, if he does he's taking half the team with him or all them. Thanos is more versatile than the JLA, I see Thanos taking out MM first and then GL, while he encase Superman and Wonder Woman in a block of pure force. Thanos has his tech which will aid him in this battle, Thanos will divide and conquer and this is his best option here to win.