I thought maybe I was done thinking up new nextgen! kids... and then season 7 happened.

Muse
Parents: Treehugger & Spearhead
Siblings: N/A
Species: Earth Pony
Gender: Male
Cutiemark: Enneagram of the various 'muses'
Special talent: Inspiring others/creative thinking
Occupation: (Undecided)
Nickname(s): Mu, Musy

Personality:

(Short for now) At first glance Muse is calm and relaxed - however looks can be deceiving. The pony is actually a real chatty box, at least when it comes to brainstorming and ideas and projects, and can quickly talk a pony to tears if let do so. He loves being part of a group and lending a hand, no matter what it might be. This can throw some ponies off when they deny his help, as he can be rather pushy about it and become pouty afterwards. Muse can really hold a grudge, something his mother has long tried to coax out of his personality, but to little success.

Trivia:

O Being half-pegasus, Muse is has a mixture of feathers and fur, mos prominent on his chest, cheeks, and the back of his hooves.