Crazy theory that would make things interesting.
What if DEAN is the baby daddy! The 1st scene of the next season (if there is one) starts with Rory and Dean in Rory's bed just like they did when they had their 1st affair. The only difference is that they do not get caught by lorelai this time. They then show Dean meeting up with Rory the night after the market run in to apologize for not being more excited about Rory writing a book and being concerned about being in it. Then he goes on to vent about being the sole provider of a large family and the normal struggles of being a parent. This leads to Rory confessing all her life struggles and they both agree they miss the days when they were young, in love, and life was simple. This of course leads to them having vulnerable miserable self pity hook up.
I really hope I'm wrong, but this is just crazy enough to work with this disastrous revival.