Yes, I think there is a lot of hope. The initial hissing and growling is to be expected and the fact that they touched noses on their second sighting is a very good sign. I think the fact that Taj is so laid back will be a big help because he will allow Clayton to be top cat if he must. I think 2 days is not near enough time for total peace to reign, but I think you've gotten a good start and Taj will fit in just fine - congratulations!