WWE: Could Undertaker and Kane reunite at Battleground?

WWE fans are speculating feverishly on social media about an Undertaker comeback at Battleground this weekend - and the Dead Man may not be coming alone.
Rumours of a return have been rife this week after a snap of the WWE legend, 50, working out in a gym in Austin, Texas was tweeted out by owner Joe DeFranco, who has previously put together training regimes for the likes of Triple H.
That guesswork has gone into overdrive in the past 24 hours following posts on Reddit from user falconarrow, who has previously correctly predicted relatively unlikely scenarios - particularly before Elimination Chamber, Money in the Bank and the NXT debut of Samoa Joe - that have come to fruitition.
"I told you all that you needed to be talking about Battleground more. Did you really think that was because of a HHH swerve job? He's back," the anonymous user posted yesterday.
When asked whether it was Steve Austin being referred to, falconarrow replied: "No not him. The guy with the coffins." Falconarrow has since announced their intention to discontinue posting, but indicated 'masked Kane' could also be part of the Battleground show.
Today Wrestling Observer journalist Dave Meltzer claimed on his radio show both 'Taker and Sting would be part of SummerSlam next month, although it was not stated in what capacity the veteran stars - who last competed at Wrestlemania in March against Bray Wyatt and Triple H respectively - might appear.
It is not clear as to whether Undertaker and Sting could be matched up against one another, although both are scheduled to appear at Wizard World Comic Con in Chicago just over a week before SummerSlam. An ad for the event featuring 'Taker - real name Mark Calaway - has already been filmed, it has been claimed.
Undertaker has been referenced on WWE TV several times over the past few weeks, with Paul Heyman - the advocate of Brock Lesnar, the conqueror of Undertaker's Wrestlemania streak last year - being booed for bringing up his charge's historic win over the former seven-time champ and referring to The Authority's Director of Operations, Kane, as "Undertaker's little brother".
With Lesnar challenging WWE World Heavyweight champion Seth Rollins at Battleground this Sunday, and having seemingly taken Kane out of the picture by smashing his ankle with the ring steps on Raw earlier this week, could the Devil's Favourite Demon put his mask back on and reunite with his fellow Brother of Destruction to either aid or hinder mutual nemesis Brock to set up a titanic encounter in Brooklyn next month?
Or could champ Rollins, who has endured a fractious relationship with his Authority ally Kane and was one The Undertaker's most recent opponents - going back to April 2013 when The Shield took on Daniel Bryan, Kane and 'Taker on Raw in London - be a potential target?
* Watch Battleground live on the WWE Network on Sunday night