Brock Lesnar is scheduled to appear on WWE RAW next week on 2/25 in Dallas, Texas. Other dates Lesnar is scheduled for includes 3/11 in Indianapolis (RAW), 3/18 in Pittsburgh (RAW), 4/1 in Washington, D.C. (RAW) and 4/8 in New Jersey (RAW the night after Wrestlemania 29). While not official yet, he will be part of Wrestlemania on 4/7 in New Jersey.
Interesting to note how much WWE is keeping both Lesnar and Rock away from each other in terms of booking. The only shows the two will both be on includes 4/1 in Washington, D.C. and 4/8 in New Jersey. Paul Heyman dropped a hint about having an "opponent in mind" for The Rock at Wrestlemania 30 leading to early speculation of Rock vs. Lesnar at the event in 2014 at the Superdome.
Source: The Wrestling Observer Newsletter