You'll be a the best stop for Epcot. Riviera station should (unless something weird happens) load to Epcot before the main station ppl. even start arriving. I'd try to get in the Riviera line around 9:15 if possible, but even at 9:30; I can't imagine you'll have any issue getting to Epcot well before official park open....this is all assuming there are no weather issues.This reminds me of a question I have...hope it is ok to ask here. We have a 7:30 Topolino’s on our Epcot day. We want to be in Epcot before official opening. Will the skyliner will be a safe bet to make it back in that timeframe, if we are waiting in line at Riviera by 9:30ish? Or, should I just plan for a Lyft?
We stayed at CBR in March and walked to the Riviera station on our Epcot day a little after 9. We were the 6th family back and they started boarding about 9:50. We were on a gondola before we ever saw ppl. coming from the main station via skyliner, so we were one of the first families to arrive at IG via the skyliner that day. Once you get to IG; they'll hold the skyliner ppl. in a separate line and then once they open the temp check/turnstiles, the walkers will go in one entrance, while skyliner ppl. go in a different entrance.
I'd plan on using the skyliner, but be ready to lyft if the skyliners down or something.