Honestly I think it's nigh impossible for Kendrick to win with this next album. The minute a single comes out, the criticism will begin. "This isn't as good as x song from GKMC" or "this doesn't sound like a hit" will be the beginning.
The next step will be when the album comes out/leaks, when people skip through the album in 10-30 minutes and automatically declare it's not as good as GKMC. I guarantee you twitter and the Coli will be full of that shyt. After that the other criticisms will revolve around complaints it's not "cohesive" like GKMC (even if Kendrick makes it clear this album won't be a concept album), or complaints about whatever poppy single he does (as if Poetic Justice never existed), etc. And the final nail will be sales: if the album doesn't go plat, people will want to declare it a failure. I really think Kendrick is being set up to fail, and corny ass nikkas like Elliot Wilson can't wait to say "it's ok but not nearly as good as GKMC. It looks like Drake won the sophomore battle, since Take Care was better!"
Speaking of Drake, I also really wonder whether Drake plans on releasing his next album on the same day as Kendrick's. Seems like the ultimate boss move, as he'd no doubt outsell Kendrick. Drake has been releasing a lot of music lately, I don't think he's going to wait for 2015.