The new pet system gets implemented into PWI on June 19th, was announced within the last couple of days as part of the content update/expansion called 'Rising Call'.
At level 100 venos can train/evolve their pets, the pets get the usual 4 skills + 2 new skills + an exclusive skill. Pet stats after 100 will also be based on the venos stats similarly to the mystic and their summons. They'll also be a new 'Meridian System' that will permanently increase your stats but this looks like it'll take a while. They're revamping FB99, adding NW territories as well as 2 new NW game styles.
Thankfully a lovely person on Official forums has a bunch of info for it http://pwi-forum.perfectworld.com/showthread.php?t=1602991
(sorry if we're not allowed to link from Official, delete if need be >.<)
Is there no way we can have the new pet system too? Pretty please?