later vs upcoming

later

• At some time in the future. 

• Coming afterward in distance (following an antecedent distance as embedded within an adverbial phrase) 

• Coming afterward in time (used with than when comparing with another time). 

• See you later; goodbye. 

• Afterward in time (used with than when comparing with another time). 

• At some unspecified time in the future. 

upcoming

• Happening or appearing in the relatively near future. 

• Eggcorn of up-and-coming. 

• Pertaining to to upcome 

• comeuppance; deserts 

• The act of coming up. 

• The activity of to upcome