Is is not about Ltc eclipsing Bitcoins market cap or surpassing it as number one coin. They will rise together and have a mutually beneficial relationship. This goes for most alt coins with promising technology. This is an ecosystem not limited to one single coin just as the forein exchange isnt limited to only the US dollar. When Btc is 100k, litecoin will be 10k.
Quite ambitious, i would say 12 months if it could get to .03btc (not speculating where btc would be) that would be a very successful run for ltc.