Well your also just predicted that Zelda isn't forwards compatible. Isn't that still a possibility, no matter how small it maybe?
This isn't my opinioin, but what if Nintendo were to hold onto Zelda till the last day of E3. They would hopefully reveal everything about the REV, but also add in a tidbit that Zelda is forwards compatible. They'd advertise Zelda saying that you could own the first REV game today! People would sh!t their pants. Even more so, if they demonstrated what was so special about it (I know people don't like the idea, but Z-targeting and swinging your sword as if Link is a very clever idea), and showed how the REV features (even some we don't know yet) are incoorperated I think it'd cause a huge frenzy. Then again, Zelda launching after E3 would cause a huge frenzy anyway.
I could careless if Zelda launched with the REV. That's one more game I'd have to pick up. I'm sure you all have opinions about when to launch the game, but then again, does it really matter to you when the optimum time is? No I'm sure it doesn't, just as long as you can get your hands on it (preferrably the sooner the better).