So at this point, the only thing to topple TFA is the next Star Wars movie.
Episode VIII is probably going to drop domestically. The buildup and hype for TFA is unlikely to be matched by Ep VIII, also the current release date will make it much harder for Episode VIII to have a leggy run since there will be other Summer movies competing for screens on a weekly basis.
But you never know, it could be a far superior movie, they might shift release dates, and things like that. But there's a reason why movies tend to drop after the preceding movie does gargantuan numbers (see Avengers to Ultron, Spider-Man to Spider-Man 2, TDK to TDKR, etc)