When you make this kind of speculation, you should probably remind people it's speculation to avoid situations like this. When you state it as fact, someone will inevitably screw up and think you really mean it as fact when we have a different source material to work off of.
Personally though, I never buy offscreen deaths of main characters on anything, unless we precisely see the situation they are walking into in advance and they leave no room for doubt ahead of time. Or of course if the actor actually died or otherwise left the show with little notice (but I think in this show in particular they would be forced to recast).
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"One toot on this whistle will take you to a far away land."
-Toad, SMB3