The first DLC pack for Ubisoft's Rainbow Six Siege is scheduled to release tomorrow.
Leaked pictures allegedly show the abilities of the two operators. The attacker, Buck, has an under barrel shotgun attachment on his primary weapon. Defender, Frost, meanwhile has a mechanical trap she can use to incapacitate enemies. We'll have to wait until tomorrow to see whether the leaks are legitimate.
Ubisoft plan on expanding the shooter even further, with another three DLC bundles coming between now and October. It seems likely that each batch will give us two new operators and one new map. The developer also stated that new game modes would be headed our way too.