That's what I thought at first, but it looks like RK have it at the same price as the second release of Soundwave.
Hopefully Ratbat will see a separate release at some point in the future. In he short term it will help drive sales of MP-13B, but there's going to be a lot of people who can't or won't fork out that much primarily to get the tape and TT would be silly not to capitalise on that down the track. Maybe we'll get a twin pack of the two pack-in tapes, Laserbeak and Ratbat?