There is going to have two football games next week.

改错，两处。

把is going to have 改为are.
be going to 一般用于人有计划怎么怎么样，
there 后面不能接be going to

there are two football games next week.

只有一处，把have改为be

 there is going to be a football ( match ) next week.

1，there be 不可以和have连用 2，不可以用be going to ,因为他一般表示人的主观意愿，“打算要做”，表示将要发生的事情可以用will be 所以本句应该改为There will be two football games next week.或者There are two football games next week(表示按照计划日程安排的事可以用一般现在时态)