Now that GT has finally received 4 (FOUR) units after 2 years of waiting.
Here's what we're missing.

NEW GT Heroes
Goku and Uub
GT Trio
Super Saiyan Trunks (GT)
Uub -> Majuub
SS Goku (GT) -> SS4 Goku (Super 17 fight)
SS4 Goku (Shadow Dragon Saga)
SS4 Vegeta (Shadow Dragon Saga)
FPSS4 Goku -> SS4 Goku & SS4 Vegeta
Goku Jr.
Vegeta Jr.

NEW GT Bosses:
Ledgic
Luud
Mutchy
Rildo (Planet M-2 Domain)
Baby (Transforming)
Super Baby 2 -> RAGE -> Super Baby 2 (Giant Ape) (Controlled)
Corrupted Saiyans (Gohan, Goten and Trunks)
Android 17 & Hellfighter 17 (Tag) -> Super 17
Nuova Shenron & Eis Shenron (Tag)
Haze Shenron -> Standby that Nullifies all attacks
Oceanus Shenron