If you are concerned that you will lose your BT cuddles or that he won't settle well for Bt without the bottle perhaps a look through this thread may help
morning bottle still needed?I describe how I made the switch to a pre bath supper (solids sack) with sippy of milk in less than 2 weeks with no tears and no distrubed nights or BTs at all (and it follows Happy 's journey as she switched for her LO).
WRT the actual routine after bath I would continue to sit in the chair for a cuddle as that what you are already doing. IMO there doesn't *need* to be anything else, it's a few minutes of closeness and calm before sleep. You don't *have to* have books and some LOs find that too stimulating or fuss because they want to get to bed as they are ready for sleep (my DS would hurry the routine along to get into his bed). We do books before bath time, after bath it's just PJs, cuddle during 1 song on a CD and into bed. Books at BT might be more welcome when he's older for instance.