How to ruin things...
1. Take a great, fun movie. Here - The Mummy - with a telegenic star (Brenden Fraizer).
2. Reboot it as a disgusting bug infested nightmare and try to sell it as semi-horror.
3. But don't believe in the re-boot, so put in crazy Scientologist and try to make horror movie and action adventure. During this remove any semblance of fun.
4. Make it a little post-Apocalypse-lite to sell it to the "End of the World" crowd.
5. Ta-da - Shit!