Zamboni, that's adorable.
Newgirl, when number 2 came along, we did similar to what you plan to do and had him in our room for several months. Eventually, we started putting up the pack'n'play in the living room at night and put him out there to sleep so he wouldn't wake us or his older brother. We would then move it into our bedroom for his naps. Pretty recently (when the younger was around 16/17 months), we moved them into the same room, and for the most part, it's gone well. There will be an occasional night where they wake each other up, but those are few and far between. We put them to bed at the same time, and that usually goes well. You could always try moving them into the same room, and then if it doesn't seem like it's working after a week or two, move the younger one back into your room or the living room for a bit, and then try again after a while. EDIT: To be clear, we tried a couple times between when he was born and this last time, and reverted back each time, so even if you run into issues, don't lose hope!