With relegation already confirmed, the Latics' 2-2 final-day draw with Aston Villa had no consequences on their Premier League status and the Spaniard remains focused on enjoying their remarkable cup triumph before finalising his summer plans.
"[My future]'s not the important thing," Martinez told reporters after the game. "The important thing is that we've won the FA Cup.
"We've got an incredible group of players, the football club is in the most solid position that we have ever been and we're ready to bounce back.
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"I can guarantee you whoever is the manager has got a bright future."
Wigan became the first club to win the FA Cup and be relegated from the top division in the same season and Martinez admitted: "It's been an emotional week. We are a unique football club - we've been doing that season after season, even in relegation we have to do it in the unique way.
"We need to get stronger and regain our Premier League status. We need between 12 and 14 players to come in and decide what we're doing with the loan players.
"It's going to be a big summer, we have to bring in more players than go out - I think this season we had a squad of 22 players, 24 with the youngsters. Next season we need 27 players and a lot older than the ones we had this season because we'll be playing Thursday, Saturday and Tuesday in games that all have strong meaning; we have to be prepared for that.
"I wouldn't expect any of the players that are out of contract to stay at the club now," he added. "Every season we lose players; that happens everywhere, that's the nature of the modern game."
"We've changed the history of the football club [with the cup win], we've got a great direction now and when we come back at least level we don't have to be a team that is just trying to avoid relegation."