Set after "We Regret to Inform You" :D Pinkie Pie becomes a mother of six children, not including Pound and Pumpkin Pie-'cake'. Pinkie and Cheese then marry and have kids. The Twins now have to deal with sextuplet additions, making a huge family! :)
So, it appears the rumors are true...DJ Pon-3 and even Rarity have been bitten by bat-ponies...vampire ones! Vampire bat ponies are now common in Equestria, but who would have thought that two heroes would have been affected by them?!