Well, when in doubt, consult the dictionary:
v. ri·valed, or ri·valled ri·val·ing, or ri·val·ling ri·vals or ri·vals
v. tr.
1. To attempt to equal or surpass.
2. To be the equal of; match
So given the definition of rival, by Definition #2, they are not rivals. The Colts are not the equal of the Pats.
But interestingly, by definition #1, the colts could look at the Pats as a rival because they want to attempt to equal us. But it doesn't work the other way as the Pats do not need to equal the COlts. THey are already better.
Beat the Pats when it counts, knock us out of the postseason and go on to win a SB or two. Man, then we would have a rivalry.
Until then, I just don't see it.
On the other hand, if the Pats and Colts continure to play a regular season game every year, I could see this forming a rivalry. But you gotta win some games first, preferably when it counts. (I hope you don't - I really dislike the COlts after they complained aobut the Pats "cheating" on defense and then were caught pumping noise into the RCA Dome through the loudspeakers.)
BTW, I wish to complement you on being an excellent visitor. Most visitors here are pretty rude (though when I read the Indystar board, I am kind of embarrassed for the rudeness of visiting patsfans, so I guess being an unwelcome guest is normal.) But for me, you are welcome to post here, and I apologize for my post #2 if it was ridiculing.