Asking when the next release of whatever is the current "Insert Toy Story Name" here is not a question that makes much sense. As the previous poster notes, all you can do is update/upgrade what you've got and you should be current.
The questions that *DO* make some sense (although they will be met with the usual stonewalling) are:
1) When is the next major hardware release? (And what will it be?)
2) When is the next "major version" (i.e., a new Toy Story Name) of Raspbian going to come out?
P.S. I think there actually is a schedule for the 2nd question. But I don't know any more than that.
"L'enfer, c'est les autres"
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J lnacjrw njbruh-carppnanm vxm rb mnuncrwp vh yxbcb!