Dhaka definitely needs a 100K stadium.
Its all about having your own fortress and subjecting the opponents to a shock and awe tactics.
They should have had it by 2011 WC or least by '14.
Chittagong should have a 50K.
Coxbazar 15-20K is fine.
Khulna about 20K and so on.
Verily, in the remembrance of Allah do hearts find rest [Al-Qur'an,13:28]