My post is mainly meant in humor but there is a valid point to consider.
I suspect Pasttimes will get their events in before pre-registration ends but it was very strange that Wizards listed every other significant Magic event this year except Gencon and had scheduled a conflicting Grand Prix the exact same days. I do wonder if there is second-guessing on whether to do Gencon or not for them. Hasbro just bought the URLs for conventions tied to the Hasbro name (and has said they are considering running their own gaming con) and publicly distanced itself from Gencon with D&D (they made it a point to put out a press release that they weren't going to GenCon because Origins and PAX presented better options for them to promote D&D than GenCon did). WOTC is under new leadership and doesn't seem to have attachments to the convention their predecessors created.
If Pastimes doesn't get everything hammered out with events set for sign-up for several days with Gencon by the 19th of June (when pre-registration ends), Gencon should give exhibitors tied to MtG a chance to cancel their contracts if they wish as players who planned to focus on MtG will be at their last day to get refunds for badges.
The biggest concern is in GenCon is just continuing as it has in the past. Within a few years, you likely won't see much D&D at Gencon at all, MtG likely won't be there, Paizo is starting their own convention (Paizocon) so they will likely be downgrading their sponsorships and activity, Steve Jackson Games is virtually invisible beyond a booth (no tournaments, no Munchkin tavern, etc.), it sounds like Mayfair is starting to invest elsewhere... it would be great to hear from GenCon what their long term plan is to keep the convention interesting and healthy. Seeing the substantial number of sponsorships not sold out, no solutions for transportation for players to get to the convention from the more distant hotels (after the block sold out all downtown rooms within an hour), etc.
Having the Magic area be empty would be the first sign of Gencon starting to fade in a big way. Attendance was up last year - but the problems at the convention (Baldman, etc.) increased at the same time. The technology supporting the con is years behind similar events (compare to SD ComicCon or DragonCon or PAX East). I have really enjoyed going to Gencon but since I can only take time off to do 1 convention or similar event per year, Origins and DragonCon are looking more and more appealing.
OR <time to go back to humor...> it could be the ushering in of a new day - Bloodbowl the LARP!!! I call dibs on Orc QB for the first quarter!