Possible SPOLIER about the wedding!
I'm the trailer and on all the girls social media, we see all of Katie's bridesmaids. Stassi is standing next to Katie, so I presume she's the maid of honer... but you never know with Bravo's creative editing. Brittany, Scheana, Kristen, the co founder of Katie's website Pucker Ans Pout, and a STUNNING actress named Stephanie. We know who the bridesmaids are, and we have seen that Sandoval is standing next to Jax (prusembly as the best man) followed by Jax as either a co best man or maybe just a groomsmen.
So here's the spoiler...
Katie and Ariana are still friends, but Katie didn't want her to be a bridesmaid. Resident peacekeeper Tom Schwartz didn't want Ariana to be the only cast member invited to the wedding but not in the ceramony, so Ariana will be a "Grooms Woman" to Schwartzy. Katie not being crazy about Ariana being in her wedding but Schwartz wanting everyone (beside James and Lala of course) will be a storyline.
That's my tea!
BOOM! bazooka joe. -Randy Barry of The Real World: San Diego