One day, I shall complete my next gen guide. but for now, tidbits.
 
From left to right:
 
Luna mated with a Sphinx warrior from the western Deserts. She has never revealed his name or identity but greatly respects him. He sometimes comes to visit both Luna and Desert (mostly Desert) though he never meets with them in person. Instead, he leaves gifts for the both of them. Unique and magnificent weapons for his baby girl and various books for his darling mate. While he loves Luna, his loyalty to his king can’t be tossed aside. Luna respects that and Desert understands, though she does wish she could remember what he looks likes.
 
Princess Celestia gave birth to Sirius, though neither parent expected a unicorn. Though their time together was short, Celestia gave all her love and affection to her child. She dies when Sirius is about 4 or so, as such, he can barely remember her at all. For years afterward, Twilight is depressed, barely paying any attention to her son at all. It was only after the incident with Anansi that she started taking things seriously again. She would later adopt a young street urchin named Hazy as her son. The three would live together happily, though each had their own problems. As the brothers grew up, they’d find out she was dating somepony, though neither knew who they were. Twilight would one day come home telling her two teenage kids (Hazy would be 14 and Sirius would be 18 or 20) that she was preggers. Both would be shocked.
 
Spike and Thorax had been friends for years. While Thorax always had a crush on the dragon, he chose never to bring it up in fear that Spike would freak out. So imagine his surprise when Spike asks him out one day! Spike immediately got embarrassed and tried to take it back but Thorax would not let the chance slip away. He was going to get some if he had to change himself into that weird unicorn mare he saw Spike playing with. Their son, Fang is actually the eldest of the four current next gens here. He is older than Sirius by a year or so due to complications. Apparently two males of different species mating rarely produced offspring. Who knew? Fang is very puppy like, always friendly and affection. At least, he was when he was young. After years of being looked at as an abomination, he closes himself off to most ponies outside his friends and family.