As noted earlier, Kane appeared on KARE 11 in Minneapolis this morning to promote the Elimination Chamber and said that Brock Lesnar would be at Sunday's pay-per-view. You can watch the interview above, Kane's comments about Lesnar start at the 2:20 mark.
We reported late last month that Lesnar's next appearance would be at RAW this Monday night. However, with Elimination Chamber being so close to Lesnar's hometown of Alexandria, Minnesota, it's very possible that those plans could have changed.
As of now, both Lesnar and Paul Heyman are advertised for this Monday's RAW, while neither is listed in advertising for Sunday's PPV.