Wandering if any news on the telvanni being a sub faction or can do a quest line with to earn robes from them, cuz if u cannot join the, but can quest with them and get their robes then a telvanni guild wouldn't be a bad idea

The Telvanni didn't join the Ebonheart Pact. Whether we will see their clothing in game, I have no idea. But I'm hoping for a cephalopod helmet myself.

As Faulgor said, the Telvanni refused the terms of the Ebonheart Pact and their territories are not explorable at launch as far as we know.

According to the lore within the game world the Telvanni rarely care about what goes on in the world at large. As long as it doesn't effect their research in magicka they will never join the Ebonheart Pact. Maybe its a open story hook for ZOS for a future expansion or update.

Well the pact also outlawed slavery iirc so Indoril, Dres and Telvanni should be pissed about that either way. But Indoril will mostly do as ALMSIVI says.

I definitely would see Dres going medieval at the mere hint of a halt on slavery. Maybe there's some PvE content about it.

As for Telvanni, the only joinable factions right now are Fighters and Mages guilds, with Thieves and Dark Brotherhood (grumble, mumble) planned for post-launch release.

There is however a Telvanni player guild: http://www.teso-rp.com/forum/m/9324623/viewthread/6610675-ep-telvanni-acquisition-heavy-roleplay-high-literacy

Hey maybe only two ingame guilds means that they are really good guilds?

One can hope right?