If the album is successful, it is possible that Jackson's estate will consider releasing another album. This would be especially likely if there is a significant amount of unreleased material available. However, if the album is not successful, it is less likely that another album will be released.
The wishes of Jackson's estate are also an important factor to consider. If Jackson's estate does not want another album to be released, then it is unlikely that one will be released. However, if Jackson's estate is in favor of releasing another album, then it is more likely that one will be released.
Ultimately, whether or not another Michael Jackson album is released after the album is a decision that will be made by Jackson's estate.