Nuclear Option

Nothing quite lights a fire underneath the ass of the gods like extinction does.

During Abaddon's battle with Hel in Helheim, there were more than a few eyes on them than just Odin's. 

News of his sudden appearance spread like wildfire, and a surplus of gods and higher beings expanded their vision to the lower domain and watched Hel and Odin die horribly. 

More would have stepped down to aid them, but some were afraid of Abaddon, or to be specific, the frightening and beautiful women that he kept alongside him. 

Besides, if they went down into the underworlds to try to offer aid; they would have likely endured the same fate as Odin. 

Their vision was temporarily cut out for a moment, but they had already seen enough to get the message loud and clear. 

The great enemy was coming, and he was more than capable of enacting his promise.