Well, precedent only goes so far since this is still a trailblazing crossover, but thus far all the D&D books with a Magic Setting have coincided with a Magic card Set within a few months. Ikoria cards aren't even in Standard rotation anymore, IIRC, or soon wonbe.
Your lips to God's ears.
I am going to laugh if they announce a big Apocalypse Stone style adventure involving Vecna as a capstone to the Edition, making room for a full reboot with 6E.
I'm all for a epic Vecna adventure but I have my doubts that they will make a new edition. I could be wrong but it just doesn't make sense. I agree with @Parmandur that we wont see an edition but just D&D.
Wizards has been very clear about backwards compatibility. The changes are so small that just released Starter Set is meant to continue as the starter set for several years
Well, 5E is "just D&D" but it's still a different edition. Whenever WotC updates the rules, fans will keep changing the name of the edition to reflect those changes.
They were also clear about the backwards compatibility of 3.5 prior to release. So a lot of people are understandably leery. They put out 3X books right up to the release of 4E. It's not unimaginable that they'd keep putting out books right up until the release of an incompatible new edition.
But did they use the same Starter Set for 3&4?
Wrong Lich.
They all look the same to me.
