I think that there are nuances to the chosen antonym. Dissolve and disband imply that the team is disassembled virtually passively - the individuals returning to previous roles. Dismantling the team conveys a requirement for additional effort, perhaps to identify alternative placements for the defunct team's members.
Dissolve is frequently used to describe a process that requires little or no apparent effort:
"Casein (a dairy protein) will not simply dissolve in water."
"After failing to convene for the third time in succession, the Office Party Committee dissolved by unspoken consent."
Disband is generally used when members of a group or unit stop acting collectively:
"I started the band, I disbanded it. It's as simple as that." - John Lennon.
Dismantle requires work to be done and does not generally occur effortlessly:
Originally meant to describe the destruction of the defenses of a fortress (French: "uncloaking" the fortress), the word still conveys that effort is required.
"The Lego Certified Professional will carefully dismantle his prototype, rather than dropping it on the workbench to break it apart"