The expectations are inflated this summer, but to be honest, Danny Ainge has done everything to jack those expectations up, as he does almost every summer.
At some point, he is going to have to deliver. Yes, rationally, we cannot "expect" Danny to make great things happen if the stuff seemingly outside of his control (the lottery, free agent priorities, etc) don't go his way.
Still, I think if you continually raise the stakes, and premise your whole rebuild plan on setting your team up for a big move, you've got to come through sooner rather than later. You can't simply continue acquiring assets and maintaining flexibility in perpetuity.
If the team looks more or less the same headed into next season, save the addition of a few rookies, that has to be seen as a pretty significant failure.