Most of the initial credits are shown over forest animals and forest locations. You could use them in the alternate intro as some of them are already there, maybe just different shots.
Then we would see the initial Blunder shots from the alternate intro. He meets Blix and co etc.
Then when we get those shots of Blix stalking the lights we would go back to credits footage. Most of those shots are used in the credits, but in different positions. You'd also benefit from the better quality Blix shots. The timing between the different credits wouldn't be consistent, but it would be better than not having them at all.
The only 2 credits you'd have to lose would be Hjortsberg's and Scott's as those 2 are transposed over the giant tree, which isn't shown in the alternate intro. Unless you use those 2 shots just before they walk into the tree, after all the galloping shots.
It's your call, but with some nifty editing, it could be done.