SBLP's description just shows us the conflict. There's still 80% or more that we don't know.
Examples:
How do the new pair of pants change his life? There may be advantages/disadvantages, the characters most likely still remember him as Spongebob with a pants change (unlike Season Crud). The plot also said "ways" with an S.
Are the jeans in the promo picture Spongebob's final pick (Heading towards no here, but I digress)?
How do the other characters fit in the plot?
Remember, Steven Hillenburg, the creative genius of the first three seasons, is here now, so he can make things very intesting.
I'm DVRing this. If the episode differs a lot from TSONTS, an "I Told You So" will be posted.
(Larry's Gym is very interesting. Again, we only know the plot, but I have a feeling the trailer has something to do with it (Larry's gym enhances swagger?).)