Yes, this feud has already happened pretty recently, but Bray Wyatt would be a great challenger to carry Roman to the Rumble. His entire "anyone but you, Roman" mantra has been defied with Reigns finally winning the championship, leaving Wyatt with only one choice - earning a title match in order to deprive roman of the belt himself. This angle would only work under one condition: that it be kept as short as possible. As mentioned, the most recent feud between the pair finished only a few months ago, and a immediate re-hash would threaten to test the fans' patience. However, a brief feud would really help Roman to legitimise his reign (after presumably seeing off Sheamus for good in the next few weeks), and could even lead to some stable warfare between the champ's 'Family' and the Wyatts.
