Both the potential new course and the old classic course run on Yacht/Beach club side and by at least a portion of Boardwalk. So yes, both would be spectatable for someone who was staying at an EPCOT area resort. But as
@azrivest points out, we're just speculating as we don't know yet.
Now, earlier I came up with an estimated finish time of 7:20-7:30 for your 10k, based on your pace and being towards the end of the starting groups. As you can see from
@azrivest screen shot for MW 2022, the 10k buses are not re-running until 7:00am (we don't know Princess yet). Based on my experience, spectators should not board a bus to view a runner finishing unless it's at least 35 min from when buses begin to re-run. So if the 10k buses start up again from resort headed to EPCOT at 7:00am, then anyone finishing before 7:35am is unlikely to be seen. You fall into that window with an estimated finish of 7:20-7:30am. So my recommendation is either:
1) Your spectator views you from the Boardwalk area.
2) Your spectator boards one of the last buses at 4:30am, sits at the finish line until 7:20-7:30am to see you finish.
3) Your spectator gets some other form of travel like an uber at 6:00-6:30am and heads to the finish line.
Based on my experience and the timing we're calculating, I don't think having your spectator board a 7am bus will get them there in time to see you finish.