A FlyerTalk Posting Legend
Join Date: Sep 2009
Location: Minneapolis: DL DM charter 2.3MM
Programs: A3*Gold, SPG Plat, HyattDiamond, MarriottPP, LHW exAccess, ICI, Raffles Amb, NW PE MM, TWA Gold MM
Posts: 100,417
Do you have elite status on DL? If not, you should not expect to be upgraded or given a free bag. Since you are concerned about the fee for (apparently) the first checked bag, I would assume that you have no status on DL or SkyTeam. Do not expect to leapfrog elites on your new flight because DL kindly gave your a confirmed reservation on an otherwise full flight.
If you are elite, you might be upgraded according to the usual process and priority ordering rules.