Sorry, just popped on as distraction from work, thought I'd said the original would continue to exist unaffected by the remake, to which you replied no it won't. Sorry, long week.
Yes, they've given us this. What has it done to the original? Has it removed scenes from it? Have they gone back and CG versions of the new cast into the old one? Has it led to every copy in exisence mystruiously disappearing?
No. Of course not. The original film exists in exactly the same...
http://tvtropes.org/pmwiki/pmwiki.php/Main/RemakeCameo
http://filmschoolrejects.com/features/6-great-remakes-cameos-from-the-original-movies-stars.php
I'm sure you'll find watching the trailer, or even the entire movie, won't have any impact on the original.