You would die. :I
That, or they'd just be stale. Depends on what brand and how you have kept them. For example, if they've been refrigerated for that long, the dough may have begun to crystallize, and it will taste funny. :c
Yes, refrigerated. Yes, I am hungry.
Canned dough crystallizes, though, and it can taste awful. Otherwise, normally canned goods last a long while.
Well, I will tell you soon enough.