Shelltoon 
OG brone
Assuming Event Special was Rainbow Roadtrip, this calendar wouldn't be too far off from what we've had. My guess is G5 will first be shown off in toy form at the 2020 Toy Fair before SDCC would be when the first trailer drops, assuming they're still on course with this. Otherwise I expect them to be cooking something up for FiM's 10th anniversary in 2020.