Former WWE World Heavyweight Champion John Cena is reportedly working through injuries that are serious enough to cause some concerns about his long-term in-ring future with the company.

Hulk Hogan Opens Up About The Monday Night Wars

According to Wrestlingheadlines.com, there have been talks within the WWE in the last two months that Cena is still having problems with his shoulder while he has also experienced more problems within his neck. These are reportedly long-term nagging issues that the 15-time WWE Champion has been dealing with.

Per the report, it is also said that there are people within the WWE are keeping an eye on Cena to see where he is going forward in regards to acting and not wrestling as much. Cena is banged up, and he could very well turn to movies as a way to make a living outside of the ring due to his injuries piling up.

WWE SmackDown Spoilers For Friday From California

There are also reportedly people within the WWE who say that Cena appears to be in pain and they believe that he has slowed down physically in the way he moves.

Cena is slated for a rematch against Brock Lesnar at Night of Champions on Sept. 21 at the Bridgestone Arena in Nashville, and with Lesnar being a more physical wrestler than most people on the roster, it could conceivably cause Cena to experience even more pain.

The WWE booked "The Beast" to dominate Cena at SummerSlam in Los Angeles at the Staples Center on Aug. 17 in a match that saw Lesnar explode with 16 German suplexes on Cena en route to hitting him with the F-5 for the victory.

If Cena's career ends up winding down soon, there is really no clear No. 2 babyface in the company that is ready to fill the top role. CM Punk and Daniel Bryan were very popular options, but paled in comparison to Cena in merchandise sales.

With Punk quitting the company in January and Bryan being sidelined since mid-May due to undergoing neck surgery while a second procedure could loom and sideline him for at least three more months, losing Cena would be a huge blow to the company.

The WWE has begun molding Roman Reigns to be the next big star ever since his singles push started in June with the breakup of The Shield, but Reigns isn't ready to be the No. 1 guy in the promotion and not everyone is behind his monster push.

Reigns is reportedly slated to dethrone Lesnar at WrestleMania 31 next March in Santa Clara, Calif., but the push toward that is expected to be slow, so the WWE can't just thrust him into Cena's spot should something happen.

It remains to be seen how serious Cena is injured, but there appears to be some growing concerns that the face of the WWE could be on his way out.

For more coverage, follow us on Twitter @SportsWN and Like Us on Facebook