Plus, based on the current flow, I don't think 2014 will be good either since there is absolutely no room for new series to get popular. The only way for the upcoming new series to do well is to end one of old series.
Now that you mention that, I have to agree. There really is no room left for new series to get popular, let alone survive over 20 chapters.
Looking at all the stable series at WSJ we have at the moment and the years they started, we have:
1976: Kochikame
1997: One Piece
1999: Naruto
2001: Bleach
2004: Gintama
2008: Toriko
2009: Kuroko, Beelzebub
2011: Nisekoi
2012: Haikyu, Kusuo Saiki, AC, Soma
2013: WT, SC, Isobe
So that's 16 series with stable positions on the ToC. I presume that leaves about 4 spaces open on the magazine. That's as minimum the number of open slots it can get: 2 each for series to debut and series about to get cancelled.
2012 has been one of the best years WSJ has ever had in terms of new successes, with 4 of them easily becoming strongholds on the magazine: Haikyu, Kusuo Saiki, AC, and Soma. This is further augmented by Nisekoi serializing a few weeks earlier, moderate but survivable hits WT and SC serializing a few months later, and of course, Isobe. In return, we've seen six major hits finish within this same time period from 2011 to the present: Bakuman, Inumarudashi, Nuramago, Reborn, Medaka Box and Sket Dance.
Looking at the list above, there's a relative lack of popular series still surviving from before 2009 compared to all the number of hits we've been getting since late 2011 alone. At the same time, however, each and every one of these remaining older hits have a firm presence in the magazine, with no signs of disappearing anytime soon.
Consequently, with a landslide of newer hits from recent years, and the relative lack of surviving hits from earlier years, they've also had the effect of taking up so many more slots on the magazine than can be replenished by long-running series getting cancelled.
In other words, any new series that is going to debut within the next several months is going to face competition so severe, it's going to have a much higher chance getting cancelled in under 20 chapters than surviving for even 50. For the latter to happen, a new series must, MUST oust a current series from the magazine, and neither of these 16 seem to be going anytime soon.
From what I can tell, the closest of the stable 16 series people seem to agree are about to finish soon are Naruto, Bleach and Beelzebub, but I don't think it's going to happen within the next few months. And what if Hunter x Hunter returns?
Still, ignoring all the series that bomb after the first 7-8 chapters, WT and SC seem to be the weakest links of WSJ at the moment, so there might be some merit in discussing the two series.
To summarize: After such a high turnover rate of stable series on Weekly Shonen Jump these past few years, 2014 will see it plummet hard, making it potentially one of the worst years for new hits to come out on the magazine.