C'mon folks it's not that hard, Steve isn't where he needs to be at this time of year I.E ~98% fitness (He needs 100% in July, boy does he need 100%)
Regardless when he restarts he will follow his plan all be it with a different start point. Steve spent years developing his plan, he'll follow it. That means to start now he would need to be able to cover 265 (lower schedule) or 284 (upper) miles per day. Steve managed 280 once recently, no other ride has reached his June lower target. It took 19 hours to do those 280 miles leaving 5 hours for end of day food, shower and sleep. His schedules require he complete the distance in 16-18 hours leaving a more reasonable 6-8 hours per day. I would guess he'll be targetting the fastest pace on days of a fair wind. 6-8 hours a night is damn hard but much more sustainable than 5 per day.
As Steve's fitness, demonstrated by his speed, matches his schedule then he'll be in a position to restart. I have my doubts that will be any time soon. He could probably take a few weeks off the bike and still ramp up to meet the descending requirement in late summer but that's not Steve is it?