I think it's a great start for a practically unknown franchise and with the not too big yet install-base of the 3DS. It will reach the million easily through legs. Compare it to Resident Evil in the same week, it's not too much behind and resi is a well established name and PS3 and X360 have a massive bigger install-base. Look at Resident Evil: Revelations, same system:
http://www.vgchartz.com/game/45684/resident-evil-revelations/Global/
If you calculate with the later US-start (+85K) it had a start-week of 300K. 240K from Kid Icarus is not that far away, so I'm happy with that number.
Edit: I also think Kid Icarus will have better legs than Revelations, so it will overtake Resi after some time.







