In the post you linked to, many folks did comment that Thula was toying with Mark. They also specifically referenced the fight with Allen as an example where Viltrumites mock their prey.
The Viltrumites could have sent a death squad to Earth the second they found out that Nolan abandoned his post. Sending Mark back as their Viltrumite probably has some significance too. I haven’t read the comics but it feels like clear foreshadowing. (No spoilers, please.) It stands to reason this is the outcome they wanted and they held back.
In the post you linked to, many folks did comment that Thula was toying with Mark. They also specifically referenced the fight with Allen as an example where Viltrumites mock their prey.
The Viltrumites could have sent a death squad to Earth the second they found out that Nolan abandoned his post. Sending Mark back as their Viltrumite probably has some significance too. I haven’t read the comics but it feels like clear foreshadowing. (No spoilers, please.) It stands to reason this is the outcome they wanted and they held back.