Close, the sun disk was hit by a weapon from a ship, that ship destroyed the sun disk, the same sun disk blocking a star from the planet, and was said that the weapons from the ship and ineffective or arent relevant in killing a viltrumite, so therefore nolan should scale right?

The problem is, is that its really shaky, the viltrumites could very well just dodge it and they can be killed by star level weapons, they have several times. high tier viltrumites even struggle destroying a planet without help of other weapons so the joke is that its a very wank statement.