I admit I'm being aggressively optimistic. I'm making a few assumptions and withholding the likely infringement on time constraints and resources by Covid-19 and the lawsuits.
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I was initially trying to mark things that I thought were realistic (Dalaran, New Race, Ducks, Dragon Isles and half-World Revamp) but I got carried away in fantasizing. I'm absolutely getting my hopes up and being unrealistic to some extent, but I'm riding the copium until I inevitably am disappointed by the expansion that we get.
I think Dalaran Landing, Lordaeron Revamp and a new class of some kind seem particularly inevitable (realistically Dragonsworn, in my fantasies Dragon), and Dragon Isles seems likely since the expansion is called "Dragonflight".