I agree the potential is there but it's a big if. The ground was built by John Dennis with that in mind. However, the truth paints a different picture. Our average gate over the last 20 years averages out at around 10/11k give or take.
The last time we dragged in over 20k was probably the Chelsea match in 2008.
To build a bigger stadium would be daft.
There's around 3000 empty seats in the North stand going begging on Friday night if they segregated it....... Bloody Madness imo.