"We've got to be wary that Bangladesh have a strong left-arm spin attack and world-class batsmen in Shakib Al Hasan and Tamim Iqbal."
One way New Zealand has proposed to counter the spin is to open with left-hander James Franklin.
"I don't know if it'll happen yet but it's a bit of a no-brainer to counter them," McCullum says. "It could also open up options for later in the innings. You've just got to throw all those things in the mix and not be too stubborn about your style of play."
McCullum seemed in a reflective mood when asked about the legacy he hopes to leave from the game. There was no suggestion of retirement but the chat left you wondering how much more of the touring lifestyle, the aches and pains in the joints and the significant off-field demands he can sustain as he nears his 31st birthday.
"You can't change people's perceptions," McCullum says. "It comes with the territory. From my point of view I have given it everything. I have worked incredibly hard on tour to try to make the team significantly better. It has meant spending a lot of time away from my family."
McCullum insists he is right to keep wickets tonight in New Zealand's opening match. He hyper-extended his right elbow colliding with Kyle Mills as both tried to catch Yuvraj Singh in New Zealand's recent T20 win in Chennai.
"I should be okay, I've done a bit of ligament damage, that's all."
Andrew Alderson flew to the Twenty20 World Cup in Sri Lanka courtesy of Emirates Airline (www.emirates.com/nz).