This is pure speculation on my part, but I think the convention idea might be Phil fishing for a hotel staycation. He'll do the usual Phil think where he promises content, but instead of recording live at the con he'll just talk about it during his prestream. Maybe record a generic video vaguely talking about the event. He won't actually waddle around the convention much, let alone potentially interact with people. So, what does he get out of it? An excuse to stay in a hotel room, presumably after raising an absurd amount of money for the trip because he thinks traveling to a con is such a rare experience his dents will be too stupid to question the total.
The only vague evidence to potentially support this is Phil mentioning being unable to take Khet on a honeymoon again, and just being reminded of how much time Phil spent in the hotel room during his tournament days. Plus, it's something he did with Leanna, and Phil isn't known for being original.
This kinda falls apart with the panel option because that would get in the way with him ordering room service and staying locked in the hotel watching 80's movies. The only explanation I have is Phil always seems to include needless options in his poll, and seems especially fond of "yes 1" "yes 2" "no" polls. This is even more speculation, but maybe he does it so he can say the yes votes won even if no gets more options because the votes were split, and if you exclude the troll votes, it just so happens to be whatever result Phil wanted overwhelmingly won.
At the very least, I think we can all agree there's no way he actually wants to go to a convention, let alone host a panel.