Sometimes The Voice tips off its panel for next season during high-profile, current season episodes. It’s why fans suspected Reba McEntire would replace Blake Shelton ahead of Season 24 when she appeared as a mega mentor during Season 23. Hardly anyone figured NBC had done it again during last December’s finale. McEntire and Dan + Shay are currently coaches on Season 25 of The Voice. This week, the reality show will feature the third and fourth battle episodes.Live episodes will begin next month.Related: What Does the Winner of The Voice Get? In December, Keith Urban was one of several artists…