Well
*puts on big brain hat, shirt, and face tattoo* my first question would be what are Gloriana's resistance feats? If Storm struck her with a lightning bolt like she used to KO the Black Bird, would Gloriana be able to shake it off like Taylor Swift or would it end the fight before it really starts?
Moving beyond that, I would then ask how is her willpower compared to Storm's? Going off her Wiki entry she apparently has "master" control over the classic 4 elements which is nice for her, but in a battle of wills would she out control Storm's control?
My next question would be how smart is she in combat and does she employ any haxxer movies like Storm can?
Her growing in size shouldn't really be a issue for Storm unless size=more power for her which I don't know.
Another question I would bring to the table is how well-versed is she in magic? Could she use some sort of mystical machinations against Storm that could secure her the win or just outright overpower Storm altogether?
And lastly, when Storm was a horseman for Nate and was singlehandedly "destroying us" as Psylocke put it, Gloriana was in the mix. Now it could just be writer ignorance (99.999999999% sure it is) that they didn't have her step up to the plate to try and reign Storm in or maybe they just didn't think she was up for the job. Who knows?
The Calvary
The Showdown