He would probably like to have everything. And all at the same time. But winning a real Grand Slam is probably the biggest thing of all. Especially because the last Grand Slam was quite a long time ago: 1969.
Although a Golden Slam is even better. But only Steffi Graf has achieved that so far in 1988. But next year would be another opportunity for that.

Novak Djokovic has performed really well in this recent Australian Open. So, I think we can expect a good performance from him. In this Australian Open actually, no one even came close to him in terms of competition. So, I believe that he's going to perform really well in this tournament as well. But he will have some competition, better competition at least. And the best competition for him is going to be Alcaraz. There will be a lot more skillful gameplay on display.
Yea its probably going to come down to Alcaraz to lead the challenge depending on
his injury and if he can make a full recovery.