There are some credible rumors going around that we will be getting the Keyfit 30 (not clue on when exactly though). We may at some point see the Snugride 35. Remember though, the idea behind a higher weight seat (especially the Graco ones) isn’t that you would actually get a child to 30, 32 or 35 lbs in the seat. Typically these seats will last the vast majority of children to their 1st birthday. They last this long not really due to the weight limit but because of the height of the shells. The Britax Chaperone has a taller seat shell (from bum to top of the seat) so even though it is only rated to 22lbs, it will take children further than a Graco seat that goes to 22lbs.
Do tell more on the rumors about the KF 30?
Some of the patterns currently available in store are the KF 30 seat sold in the US, but are only rated to 22lbs in Canada. I'm not sure of the reason why, but it may be a case of the same reason as the chaperone is only rated to 22lbs in Canada - fitment requirements.
OP - unless you have a heavy kid, the vast majority of kids outgrow their infant only seats by height before weight. The Chaperone likely won't last quite as long as the SS1 by height, but it will be close. If your babies aren't usually hitting 22lbs before a year, then I wouldn't worry too much about it.
So far as the KF30 and the KF22 go, I've read that they have the same height shell, so unless you need the higher weight limit, it doesn't really matter...
FWIW, I do expect that we'll see the SR32 change to the SR35 in Canada as well. Most kids never made it close to 30lbs in the seat anyways, so unless babe is a chubster, the weight limit of 32 vs. 35 on the infant seat isn't a big deal...