There is nothing that says the Rings of Mara is only available in the collector's/imperial edition.
There is nothing that says the Imperial race is exclusive forever unto eternity.
If they remove the bonus items from the collector's edition, it isn't a collector's edition anymore. According to what they've said, there is no huge advantage for the people who get the collector's/imperial edition.
Do people who order the Imperial
Edition gain a big gameplay advantage over those who don’t?
Updated 01/31/2014 05:24 PM Published 01/31/2014 05:24 PM
No. With the Imperial Edition, players get the opportunity to play as a rogue Imperial who has broken from their Daedra worshipping ways, and they get a unique racial skill line of equal gameplay impact to other races’ unique racial skill lines. As an Imperial, players also get a mount and the automatic ability to craft items into the Imperial style. All non-Imperial races can also learn this ability after locating the corresponding racial motif. Imperials do not begin the game in a unique starting location or via a separate quest, but they can start in any alliance as befits their status as un-aligned outcasts of their own Province. Being an Imperial includes a racial skill line that offers unique gameplay opportunities, but there is not an overall gameplay advantage. It is an opportunity to set oneself visually apart in the lands of Tamriel.
Gameplay benefits within this edition have been designed to avoid bestowing unfair advantages over players who do not purchase this special edition. This is cool content designed for some of our biggest fans who wish to have something different from other collector’s editions in the market. The only other alternative would have been to offer a collector’s edition that offers no in-game items whatsoever. That simply didn’t seem fair to fans who are excited about the game and want some special digital items.