Sounds like a good bet. I'd say Tennis is less predictable then some sports, need to check his record. Also Wimbledon has been excluded from world rankings for barring Russian players, though I imagine the money remains a large enough incentive. Djokovic was deported from Australia, I think he is angry enough to win now :p
Djokovic has not been in the best shape this year but is the big favorite to win. According to the bookies, Nadal is the number 2 candidate to win, but he still has his foot injury and grass is not his favorite underground. Maybe we get a surprise with one of the younger talents, so it can be an interesting tournament to watch.
I think it is too early to place any definitive bets. Let's wait few days (&games) to see how they look like.
We have already a first "surprise" - Serena Williams is out. I was just checking what are the odds, I haven't found her and I then I saw the news about Harmony Tan. It makes me think to start betting on "others" (8.94) category, as I do not see a clear leader.