Adding another layer to the story with one more movie is something that could happen, butis it necessary?
The characters will likely want to attract several aliens to take them down now they have their own weapon.
Withtwo well-received moviesin the bank, sometimes quality is key, rather than quantity.
Needs To Be A Trilogy: Do The Abbott Family Get Back Together?
Needs To Be A Trilogy: What If The Aliens Evolve?
It has allowed the characters and their individual feelings to be explored in huge detail.
Needs To Be A Trilogy: How Does The Rest Of The World Learn?
The aliens no longer present the same fear due to the fact audiences know how they will be beaten.