Nokia Lanai will be called Asha 503. It will look much like the firstborn of the refreshed Asha lineup - the Asha 501. However, the Nokia Asha 503 will replace the hardware Back key with a capacitive one and will have its entire front will be covered by a curved glass. You can also spot the 5MP rear camera with a LED flash. Naturally, the Asha 503 will get a dual-SIM version.
Nokia Pegasus is bound to go official as Nokia Asha 502, but we know nothing besides the name for that one. The Asha 502 should slide between the Asha 501 and the Asha 503.
It seems that the announcement of those Asha phones is close now that the official renderings are done.