2. The canon ship of "Willowverse" (I guess), Big Mac ends up with Blueblood and they raise a handsome colt together www.deviantart.com/gigason/art…
3. Pinkie Pie and Svengallop's son (still thinking of a name). Long story short, Svengallop asked one more thing out of Pinkie Pie, before Applejack took action.
4. Pinkie after just giving birth to her son, after going through a long and horrible pregnancy. She tried hard to hide it from her friends, saying she's just had too much cake, but they eventually find out and do everything they can to help. She doesn't tell them who the baby's father is until she gives birth. (Applejack has her suspicions, but stays quiet)
5. The other mane 5 don't take kindly to Svengallop coming back to Ponyville (at Twilight's "request"). Twilight eventually gives him an ultumatum: step up and be a father or never come to Ponyville again. He chooses the latter.
6. As explained here www.deviantart.com/gigason/art… , this is right after Trixie fails to duplicate herself and instead mixes her DNA with Sunburst's, resulting in Sun Flare's "birth"