In a letter to the club's members, Johnson confirmed the EGM where he would be opposed by a ticket led by current directors Mick Power and Paul Williams.
Johnson has remained tight-lipped about the battle since it exploded two months ago, but used the letter as a forum to set the record straight.
"I firmly believe these current board issues can be resolved to allow the club to focus on returning to on-field success and finals football next season," Johnson said.
"However, reaching a resolution requires all of the directors to act in the best interests of the club and not to seek to divide the club for their own purposes."
The Power-Williams-Leigh Matthews ticket first assembled in late August after claiming Johnson bungled an attempt to hire new Melbourne coach Paul Roos.
They then rallied support of more than 800 full-voting club members in September, who signed and submitted forms to the club, calling for an EGM.
After attempting mediation with the AFL Commission, the differences of the warring factions could not be resolved.
Matthews recently took to Twitter to express his frustration.
Johnson said fighting in public was not good for the club and apologised to members for not setting the record straight earlier.
He went to great lengths to clarify a number of sticking points with members.
Johnson explained the process behind former coach Michael Voss' sacking, and how the club's constitution kept life member Matthews off the board.
He said he wanted Matthews on the board, but not with the four-time premiership coach dictating his terms and the directors he wanted to sit beside.
The board will meet on Wednesday to discuss the EGM, and Lions members will be sent formal notification shortly with more information on the resolutions.
Twitter: @AFL_mikewhiting