To my knowledge, Locofuria has never posted previews for their comics. At best, you can find the information on said comic (process types, artists involved, no. of pages, etc.) by going to the provided link(s). From there, you can check out the artists' previous work and determine if it's worth shelling out the money for. Alternatively, you can wait for Locofuria to upload the comic for free in about three years, give or take.
Now or later...those are your options; I went with the latter. Didn't care too much for the muscle growth (less so for the Super Saiyan transformations), but that's just me. I'm willing to see where this goes, especially given that this is possibly the first in a series. As a fan of AP, I'm looking forward to what the future could bring.
