Well hopefully he will just be pleased it is there and get used to it after a day or so. I mean, its a stuffed toy, not a play gym
. I was initially very anxious about it as well, and used to sit thinking 'pleeaase go to sleep' and he would be singing to his bear and flinging it around. Then I realised that was HOW he put himself to sleep. I little chatter to settle in, then some self soothing, then asleep.
Once he expects it to be there he will actually find it a comfort when he wakes at night or in the middle of a nap. J grabs his, has a quite chatter and puts himself back to sleep. Its actually better than ending up 'calling' for you.
When I was fussing my mum told me that it is nothing compared to what a toddler will do. They will sing 5 nursery rhymes, run round the room, bang feet on the wall etc.
I would just put it in there and see what happens.